197612685 has 12 divisors (see below), whose sum is σ = 342528732. Its totient is φ = 105393408.

The previous prime is 197612651. The next prime is 197612689. The reversal of 197612685 is 586216791.

It can be written as a sum of positive squares in 2 ways, for example, as 127103076 + 70509609 = 11274^2 + 8397^2 .

It is not a de Polignac number, because 197612685 - 2⁶ = 197612621 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 4391393 = 197612685 / (1 + 9 + 7 + 6 + 1 + 2 + 6 + 8 + 5).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 197612685.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197612689) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2195652 + ... + 2195741.

It is an arithmetic number, because the mean of its divisors is an integer number (28544061).

Almost surely, 2^197612685 is an apocalyptic number.

197612685 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

197612685 is a deficient number, since it is larger than the sum of its proper divisors (144916047).

197612685 is a wasteful number, since it uses less digits than its factorization.

197612685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4391404 (or 4391401 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 197612685 is about 14057.4779032371. The cubic root of 197612685 is about 582.4673770772.

The spelling of 197612685 in words is "one hundred ninety-seven million, six hundred twelve thousand, six hundred eighty-five".